Ya, they do neccessitate a 18+, but I have that covered. I saw a post saying they are about 500 for the fronts, so about 250 more than just a set of powerslots. Sounds like a pretty good deal to me. I would stay with just a powerslot rear upgrade since they are a little cheaper and the fronts take most of the burden.
I forgot about the larger wheel requirement. Do you think they are worth the extra money?? It will be a couple months before I do it.

 

Well if I had 18" wheels, I'd get the largest rotors I could find...that'd be the 14" ones. They cost more but your braking would be better.

Stainless lines are badass, I installed set on my F150 and the braking is soooooo much better! I'd start with them and you'd be suprised. Then with larger rotors you'll stop that much better as you already have the 2 piston rear calipers...

 

I love my suburban rear brakes. Once they broke in I could feel a real difference, stopping distance and brake pedal feel both improved. I wanted to do some more brake upgrades before I put the suburban calipers on. Now I think that this is all I need, being I have a single cab. The reason I did the swap, besides it was free, was that you can put the stock rims back on for the track.
The only problem I have seen is that the rears lock-up and cause ABS activation, when wet. However, I have a hard time calling this a "problem".
You will need the burban caliper bracket but, there is no need to change the backing plate.

 

Do you know how much calipers and brackets are? Also, could I get the calipers w/o pads if I order them?

 

I did lines, pads, and rotors all around for $450. Still waiting on my lines though, not going to push these things hard until I get those new lines, my rear axle line is almost worn through and the fluid is so trashed I can push the pedal to the floor no problem any time i want.

 

Ive never taking off the tires on a Silverado, but couldnt you put the rear burbs brakes on the front also since the front does more work? Or is the position of the rotor different from the front?

 

The stock front brakes are already twin piston. The positions and bolt hole locations and setup of the rears are totally different than the front.

 

I don't know the cost of the calipers or brackets. The pads do not come with calipers. I would try a junkyard for the parts and buy a rebuild kits for the calipers. I do know that the pads are high, over a $100. If you want to buy the parts new pm me, I can buy them at cost+10%.